Sweeney Family History
Sweeney Name Meaning
Irish and Scottish: shortened form of McSweeney from Gaelic Mac Suibhne ‘son of Suibhne’ a personal name meaning ‘pleasant’. Loss of initial Mac in this surname seems to have been encouraged by the Irish variant Ó Suibhne. For the Scottish form Mac Shuibhne with loss of the final syllable and lenition of the personal name after Mac compare McSween and McQueen . Americanized form of French Choiniere . Americanized form of French Chouinard . Compare Swenor .
Source: Dictionary of American Family Names 2nd edition, 2022